Polymer-modified polyol dispersion

Abstract

The invention relates to a method of making a polymer-modified polyol having a solid content from 13 to 55 wt. % wherein an olamine is reacted with an organic polyisocyanate in the presence of a base polyol and at least one catalyst, wherein said at least one catalyst is a zinc carboxylate, and wherein the base polyol has hydroxyl functions wherein more than 20% of said hydroxyl functions are primary hydroxyl functions. The invention further relates to a polymer-modified polyol obtainable with the method of the invention, the use of the polymer-modified polyol for the preparation of optionally foamed plastics, and to a method for the preparation of optionally foamed plastics using the polymer-modified polyol of the invention.

1 - 25 . (canceled) 
     
     
         26 . A method of making a polymer-modified polyol dispersion having a solid content from about 13 to about 55 wt % based on the total weight of the dispersion comprising:
 reacting an olamine with an organic polyisocyanate in the presence of a base polyol, one or more catalysts, and a cross-linking agent,   wherein the catalysts comprises a zinc carboxylate, the base polyol has hydroxyl functions where more than about 20% of said hydroxyl functions are primary hydroxyl functions, and the cross-linking agent has a weight average molecular weight of from about 200 to about 1000 g/mol.   
     
     
         27 . The method according to  claim 26 , wherein the polymer-modified polyol dispersion has a solid content from about 15 to about 50 wt % based on the total weight of the dispersion. 
     
     
         28 . The method according to  claim 26 , wherein the ratio of active hydrogen containing groups of the olamine to isocyanate groups of the polyisocyanate is from about 1 to about 2:1. 
     
     
         29 . The method according to  claim 26 , wherein the catalyst is used in an amount of greater than about 0.01, greater than about 0.03 or greater than about 0.04 or greater than about 0.1 mmol/100 g polymer-modified polyol or in an amount of from about 0.105 to about 0.25 mmol/100 g polymer-modified polyol, in particular from about 0.11 to about 0.2 mmol/100 g polymer-modified polyol. 
     
     
         30 . The method according to  claim 26 , wherein the catalyst is substantially devoid of carbon-metal bonds. 
     
     
         31 . The method according to  claim 26 , wherein the carboxylate of the zinc carboxylate has from 2 to 22 carbon atoms. 
     
     
         32 . The method according to  claim 26 , wherein the zinc carboxylate is at least one selected from zinc(II)octoate, zinc(II)ricinoleate, and zinc(II)neodecanoate. 
     
     
         33 . The method according to  claim 26 , wherein the cross linking agent has a weight average molecular weight of from about 400 to about 900 g/mol. 
     
     
         34 . The method according to  claim 26 , wherein the cross linking agent has a functionality of 2 to 8 active hydrogen containing groups capable of reacting with isocyanate functions. 
     
     
         35 . The method according to  claim 34 , wherein the cross linking agent has hydroxyl functions. 
     
     
         36 . The method according to  claim 26 , wherein the cross linking agent is a polyether polyol. 
     
     
         37 . The method according to  claim 26 , wherein the amount of cross linking agent present in the reaction is from about 0.1 to about 11 g/100 g of polymer-modified polyol. 
     
     
         38 . The method according to  claim 26 , wherein the base polyol has a weight average molecular weight from about 2000 to about 15000 g/mol. 
     
     
         39 . The method according to  claim 26 , wherein greater than about 50% of the hydroxyl functions of the base polyol are primary hydroxyl functions. 
     
     
         40 . The method according to  claim 26 , wherein the base polyol has 2 to 6 hydroxy functions. 
     
     
         41 . The method according to  claim 26 , wherein the amount of olamine used in the reaction is from about 1 to about 25 g/100 g polymer-modified polyol. 
     
     
         42 . The method according to  claim 26 , wherein the olamine is selected from the group consisting of ethanolamine, diethanolamine, triethanolamine, propanolamine, dipropanolamine, tripropanolamine, isopropranolamine, diisopropanolamine, triisopropanolamine, N-methyldiethanolamine, N-ethyldiethanolamine, N-butyldiethanolamine, ethylene diamine with ethylene oxide or with propylene oxide, alkoxylated ethylene diamine, ethylene triamine with ethylene oxide or with propylene oxide, alkoxylated ethylene triamine with ethylene oxide or with propylene oxide, alkoxylated ammonia, or any combination thereof. 
     
     
         43 . The method according to  claim 26 , wherein the amount of organic polyisocyanate used in the reaction is from about 2 to about 35 g/100 g polymer-modified polyol. 
     
     
         44 . The method according to  claim 26 , wherein the organic polyisocyanate is selected from the group consisting of ethylene diisocyanate, 1,4-tetramethylene diisocyanate, 1,6-hexamethylene diisocyanate, cyclohexane 1,3-diisocyanate, cyclohexane 1,4-diisocyanate and mixtures of these isomers, 2,4-toluene diisocyanate, 2,6-toluene diisocyanate and mixtures of these isomers, 2,2′-methylene diphenyl isocyanate, 2,4′-methylene diphenyl isocyanate, 4,4′-methylene diphenyl isocyanate, naphthylene 1,5-diisocyanate, triphenylmethane 4,4′,4″-triisocyanate, or any combination thereof. 
     
     
         45 . The method according to  claim 26 , wherein the polymer-modified polyol has a dynamic viscosity from about 2000 to about 7000 mPa·s at 25° C. 
     
     
         46 . The method according to  claim 26 , wherein the reaction is performed at a temperature from about 10 to about 200° C. 
     
     
         47 . A polymer-modified polyol dispersion generated according to the method of  claim 26 . 
     
     
         48 . A method of manufacturing a polyurethane plastic article comprising:
 providing a polymer-modified polyol dispersion generated according to the method of  claim 26 ; and   processing the polymer-modified polyol dispersion into the polyurethane plastic article.   
     
     
         49 . A method for generating foamable polyurethane plastics, wherein at least one polyisocyanate is reacted with a polymer-modified polyol according to  claim 26 , in the presence of one or more blowing agents, and in the presence of one or more optional additional catalysts.